Improvement in pumps



anni @Mira AARON CARVER., or LITTLE FALLS, New YORK.

Letters Patent No. 102,369, dated April 26, 1870.

rMPRovEMENT IN PUMPs.

The Schedule referred to in these Letters Patent and making part of the saine.

To all whom 'it may concern:

Be it known that I, AARON CARVER, of Little Falls, in the county of Herkimer and State of New York, haveinvented certain Improvements in Double. acting Pumps; and I do hereby declaro that the following is a full, clear, and exact description thereof, reference being had to the annexed drawings making part of this specification, in which- Figure l is an elevation.

Figure 2 is a central vertical section.

Figures 3 to 9 are views, on an enlarged scale, of detached portions of the pumpr The same letters are used -in all the figures in the designation of identical parts.

This invention relates to the valves of pumps; and

It consists in a peculiar construction thereof, as will be more speciiically set forth hereinafter.

To enable those skilled in the art to make and use my invention, I will proceed to describe its construction and Operation.

In the annexed drawings- A represents thev outer pump, barrel, or cylinder,.

made of a suitable diameter, and of sulicient length to'receive and encircle-the inner cylinder, in which the piston works and the valves.

Its upper end has :te-horizontal flange/to which the head B is secured, a suitable packing being confined between such headvand ange to make a water-tight joint.

It-slower end is closed bythe head C', which may be screwed into it, as shown, or secured to it in any other suitable and convenient manner.

rlhe under surface of the head B has an annular groove, b, into which the upper end ofthe cylinder D recedes on securing the several parts of the pump together.

From the upper surface of this head, and surrounding the central aperture through which the hollow piston-rod passes, extends a tubular projection, B', to which the discharge-pipe is connected, said pipe extending upward to the surface, and surrounding the connecting-rod by which the pistou is operated.

rlhe lower head O has a large central aperture surrounded by an annular vertical flange rising from its inner or upper surface, and forming a seat for the footvalve H, which closes this aperture.

A ring, C', is screwed or otherwise secured to the upper end of this flange, having also au annular vertical flange near its periphery, the outer diameter of which is equal to the inner diameter of the piston-cylinder which is placed over it, resting upon the outer portion ofthe ring.

The vertical flange of the ring G1 rises some distance above the foot-valve H, and has in its upper end a cross-bar, C, to stop at theproper point the upward movement ot' the valve when opened by the pressure ofthe water.

A series of smaller openings are 'made in the head C around the large central aperture, and these openings are closed by a series of valves, I, the movement of which, when opened by the upward pressure of the surrounding water, is controlled `by the ring C1, which extends horizontally over them.

D represents the inner or piston-cylimlcr, resting with its lower edge upon the ring C1, fitting neatlyover its flange, and extending upward to theupper endof the inclosing-cylinder A, recedcs into the annular groove in the head B,.and is thus heldiri'nly in position. A series of openings, D1, near its upperend, are the only means of communication between its interior and the surroundingl cylinder A.

The piston E is a short tube with a peripheral recess to receive the packing necessaryto make a tight joint bet-weon it and the cylinder D,in which it works. Its lower end is vfitted with a disk, El, conveniently secured to it, and which has openings c1 cI near its periphery, in form and sizc like the openingsc c in its upper permanent disk, as clearly shown inhg. 5.

Ihe'hollow piston-rod F maybe cast in one piece with the piston, rising centrally and vertically from its upper disk, as shown in the drawings; or,"itmay be constructed separately, andl fastened to the-piston. In either case, its aperture must 'communicate with the interior ofthe piston. The length of this hollow rod, or portion of the piston, as the lcase may be, is' such that its openings 11"through which the water is discharged into the disclnuge-pipe, are always aboye` the hub on the head B, through which it works airtight. Its upper end is closed, as shown, and to it may be attached a connecting-rod passing upward to the surface, and operated in any convenient manner.v

G represents the piston-valve, which alternatelycloses the openings in the uppcr and lower disksof such piston. It is a circular plate of metal, fitting loosely in the pist-on, and ithas a cent-ral opening of the diameter ofthe chamber inthe hollow piston-rod.

The valves H and I are alike in construction, and consist of a circular disk of sufficient diameter, provided with downwardly-projecting wings or guides, in the usual manner, between which disk and upper edge of the guides an elastic packing-ring, H', isinterposed. The guides are not directly connected to the upper disk of the valve, but to a collar formed upon the under surface of such disk, which collar is made of a somewhat smaller diameter than that of a circle described over theI outer surfaces of the guides, so that the latter project beyond the periphery of the collar,

, worn, it being only necessary to provide it with a new packing-ring.

.The operation of the pump may be described as follows:

All its parts having been constructed and arranged as above set forth, the pump may be placed inl a well, partly or wholly immersed, and the piston put in motion. If the position of the piston at the beginning of the operation be that shown in fig. 2, the lip-stroke creates a vacuum under it in the cylinder D, causing the water to lift the foot-valve H and till the space. At the same time, the space above the piston being diminished, a corresponding quantity of air isdischarged through the openings e in the upper disk of the piston and the hollow piston-red. All this while the piston- 'alve G is held down upon the lower disk of the piston by its own gravity, and the foot\falves I remain closed for the saine reason. v At the moment the movement ofthe piston is reversed the foot-valve H is shut down and t-he piston-valve G forced against its upper seat, allowing the water in the cylinder D to enter the hollow piston-rod through ,fthe openings e ein the lower piston, disk, and aperture in the valve.

By this down-stroke a vacnum'isformed above the piston in the cylinder D, and, as this communicates by means of openings D' with the surrounding cylinder A, consequently, in the latter, which causesthe water to lift the foot-valve I and enter into such outer cylinder. The next tip-stroke will close the foot-valves I, return the'piston-valve to its lower seat, and again lift the foot-valve H to fill the space under the piston in the cylinder D with water. A portion of the water already in the piston-rod will enter the cylinder D, above the piston, during the first few strokes until all the air has been discharged from the pump. As soon as this is accomplished, the water will be forced up the hollow piston-rod continually. `Dnring the downstroke the water under the piston in cylinder D is forced up through the openings c c in the lower disk ofthe piston, and the central aperture of the valve` G. During the 11p-stroke the water above the piston is forced np tlnoughthe openings e e iu the upper disk of the piston.

Having thus described my invention, Th-atl claim, and desire'to secure b ent-,is i

The valve H, constrncted with an annular groove between its disk and its guides, to receive and retain an elastic packing-ring, substantially as set forth.

`In testimony whereof I have-signed my namedto this specification in the presence of two subscribing Letters Patwitnesses.

Witnesses: AARON CARVER.

JOHN Y. GILLILAND,

ltonnn'r W. Bann. 

